Fabrication of high‐purity HfSi 2 powder via molten salt‐assisted magnesium thermal reduction

2020 ◽  
Vol 17 (4) ◽  
pp. 1785-1789
Author(s):  
Bin Du ◽  
Chao He ◽  
Junjie Qian ◽  
Ping Hu ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Molten Salt ◽  
High Purity ◽  
Thermal Reduction ◽  
Magnesium Thermal Reduction

Molten-salt nitridation synthesis of cubic ZrN nanopowders at low temperature via magnesium thermal reduction

2018 ◽  
Vol 44 (7) ◽  
pp. 8710-8715 ◽  
Author(s):  
Yang Chen ◽  
Chengji Deng ◽  
Chao Yu ◽  
Jun Ding ◽  
Hongxi Zhu
Keyword(s):  
Low Temperature ◽  
Molten Salt ◽  
Thermal Reduction ◽  
Magnesium Thermal Reduction

scholarly journals Fabrication of High-Entropy Disilicide Nanopowders via Molten Salt-Assisted Magnesium Thermal Reduction

2020 ◽  
Author(s):  
Honghua Liu ◽  
Shanshan Ning ◽  
B. Du
Keyword(s):  
Molten Salt ◽  
Average Particle Size ◽  
Thermal Reduction ◽  
Hexagonal Structure ◽  
Harsh Environment ◽  
Average Particle ◽  
High Entropy ◽  
Compositional Uniformity ◽  
First Time ◽  
Magnesium Thermal Reduction

Abstract In this work, (Nb 0.25 Ta 0.25 Ti 0.25 Hf 0.25 )Si 2 high-entropy disilicide nanopowders were successfully fabricated via molten salt-assisted magnesium thermal reduction for the first time. The results showed that the as-obtained nanopowders possessed a single hexagonal structure (TaSi 2 -type) and consisted of numerous nanopowders with an average particle size of 55 nm . These nanopowders exhibited highly compositional uniformity at microscale , but shown the aggregation of Ti element at nanoscale. In addition, a typical template formation mechanism was proposed and analyzed in detailed. This work would provide a new way to synthesis of high-entropy disilicise powders for potential high-temperature harsh environment applications.

A modified graphitic carbon nitride (MCN)/Fe3O4 composite as a super electromagnetic wave absorber

2021 ◽  
Author(s):  
Xiaoyu Zhu ◽  
Hongfang Qiu ◽  
Ping Chen
Keyword(s):  
Electromagnetic Wave ◽  
Nitrogen Content ◽  
Carbon Nitride ◽  
Thermal Reduction ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Magnesium Thermal Reduction

The nitrogen content of g-C3N4 was reduced by magnesium thermal reduction to obtain porous C (MCN), and MCN was combined with Fe3O4 particles by decomposition of ferric acetylacetonate.

scholarly journals Research Progress in Preparation and Purification of Rare Earth Metals

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1376
Author(s):  
Hang Liu ◽  
Yao Zhang ◽  
Yikun Luan ◽  
Huimin Yu ◽  
Dianzhong Li
Keyword(s):  
Rare Earth ◽  
High Purity ◽  
Rare Earth Metals ◽  
Melting Zone ◽  
Thermal Reduction ◽  
Zone Melting ◽  
Research Progress ◽  
Molten Salt Electrolysis ◽  
Interstitial Impurities ◽  
Metallic Impurities

The purity of rare earth metals is one of the most important factors to research and develop high technique materials. However, high purity rare earth metals are not easily achieved. This review summarizes the preparation and purification methods of rare earth metals. First, the preparation principle and process of molten salt electrolysis and metal thermal reduction are introduced. The main sources of metallic impurities and interstitial impurities in rare earth metals as well as the action mechanism of reducing the concentration of different impurities are analyzed and summarized. Then, the purification principle and process of vacuum distillation, arc melting, zone melting, and solid state electromigration are also discussed. Furthermore, the removal effect and function rule of metallic impurities and interstitial impurities in rare earth metals are outlined. Finally, the crucial issues in the development of high purity rare earth metals are put forward, and the development direction of high purity rare earth metals in future are pointed out on this basis.

Facile Preparation of Superconducting NbC/C Nanocomposites by Magnesium-thermal Reduction Method

2019 ◽  
Vol 48 (12) ◽  
pp. 1465-1468 ◽  
Author(s):  
Kailong Zhang ◽  
Liangbiao Wang ◽  
Tao Mei ◽  
Lei Jiang ◽  
Huaxu Gong ◽  
...  
Keyword(s):  
Reduction Method ◽  
Thermal Reduction ◽  
Facile Preparation ◽  
Magnesium Thermal Reduction

scholarly journals Low-Temperature Molten Salt Synthesis and the Characterisation of Submicron-Sized Al8B4C7 Powder

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 70
Author(s):  
Cheng Liu ◽  
Xueyin Liu ◽  
Zhaoping Hou ◽  
Quanli Jia ◽  
Benjun Cheng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Molten Salt ◽  
Raw Materials ◽  
Reaction Medium ◽  
Thermal Reduction ◽  
Molten Salt Synthesis ◽  
Synthesis Process ◽  
Direct Reaction ◽  
Liquid Reaction ◽  
Reduction Methods

Submicron-sized (~200 nm) aluminium boron carbide (Al8B4C7) particles were synthesised from Al, B4C and carbon black raw materials in a molten NaCl-based salt at a relatively low temperature. The effects of the salt type/assembly and the firing temperature on the synthesis process were examined, and the relevant reaction mechanisms discussed. The molten salt played an important role in the Al8B4C7 formation process. By using a combined salt of 95%NaCl + 5%NaF, an effective liquid reaction medium was formed, greatly facilitating the Al8B4C7 formation. As a result, essentially phase-pure Al8B4C7 was obtained after 6 h of firing at 1250 °C. This temperature was 350–550 °C lower than that required by the conventional direct reaction and thermal reduction methods.

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